* {
  margin: 0;
  padding: 0;
}
a {
  color: black;
  text-decoration: none;
}
a:hover {
  text-decoration: none;
}
.main {
  width: 90%;
  margin: 0 auto;
  background-color: #fdf2c8;
  overflow: hidden;
}
.main .left-top {
  width: 100%;
  height: 60px;
  margin-top: 30px;
  line-height: 60px;
  padding-left: 5rem;
  vertical-align: middle;
}
.main .left-top img {
  width: 30px;
}
.main h1 {
  text-align: center;
  letter-spacing: 0.2em;
}
.main .content {
  width: 80%;
  margin: 40px auto;
}
.main .content h2 {
  margin-top: 1em;
  margin-bottom: 1em;
  font-size: 30px;
}
.main .content p {
  font-size: 20px;
  opacity: 0.8;
  text-indent: 2em;
  margin-top: 1em;
  margin-bottom: 1em;
  line-height: 2em;
}
.main .content ol {
  margin-left: 8em;
}
.main .content ol li {
  font-size: 20px;
  line-height: 2em;
}
.main .content .righter {
  text-align: right;
  font-size: 25px;
  line-height: 2em;
}
